ᐅ How much weight can the compartments in a Kallax unit actually hold?

Hello everyone,

I am currently looking into the question of how much weight each individual compartment of the Ikea Kallax shelving unit can actually hold.

I’m specifically referring to the dimensions of a standard compartment, roughly 33 x 33 cm (13 x 13 inches), assuming the shelf is used correctly and no additional heavy loads are applied unevenly or sideways. Unfortunately, there are very different figures online, often vague or lacking reliable data from official sources. So, what are your experiences, or does anyone know trustworthy numbers for the realistic and safe load per compartment?

I am interested both in the static load capacity (i.e., long-term) as well as possible short-term loads of around 20-30 kg (44-66 lbs) per compartment.

Thanks in advance for your insights!

pihalit0 schrieb:
What are your experiences or does anyone know reliable figures for a realistic and safe load per shelf?

This is a good starting question. I think it’s important to weigh the manufacturer’s official specifications against this. Ikea often specifies a maximum load, for example, 13 kg per shelf for the Kallax, but that is theoretical, and depending on the construction, it can vary significantly.

You also have to consider that transverse forces, uneven loading, or material aging will reduce the load capacity. Are you sure you want to plan for 20-30 kg per shelf on a permanent basis? That sounds quite ambitious and could damage the furniture or, in the worst case, lead to failure.

Do you already have specific use cases where such weight would be placed all at once?

neo59 schrieb:
Do you already have specific use cases where that much weight is applied at once?

Yes, I plan to use the Kallax as a combination of shelving and storage. Some compartments will be filled with books, binders, and also somewhat heavier items (e.g., technical equipment, moving boxes), distributed across the modules.

It is important to me that the structure does not suffer from regular use over time. I think that permanent loads just under 20 kg (44 lbs) per compartment could be realistic, depending on the distribution.

Short-term loads of 20–30 kg (44–66 lbs) seem acceptable to me, but probably not for permanent use. This also goes against the usual recommendations. I am looking for more precise assessments based on practical or possibly commercial experience.

Hi,

I have the Kallax at home and can say that the compartments are more stable than you might think, but 30 kg (66 lbs) continuously? Honestly, I would be a bit concerned ;-)

In my experience, up to about 15 kg (33 lbs) per compartment is fine, anything above that starts to make the shelf wobblier. The installation also matters, meaning how well the back panel is secured and whether the shelf is properly fixed to the wall.

pihalit0 schrieb:
I think 20-30 kg (44-66 lbs) is acceptable short term, but probably not for the long term.

I agree with that. Better to be safe than sorry, don’t you think?

😊

To answer the question with facts: The Kallax shelving system uses particleboard with an additional back panel made of thin MDF, which increases stability. According to the manufacturer’s specifications, the maximum load per shelf is 13 kg, but practical experience from professionals shows that a safe static load of around 15 kg per shelf without damage is realistic.

Short-term loads of up to about 20 kg can be supported, but this should not be a permanent situation.

It is also important that the load is evenly distributed and that no point loads occur. Uneven weights can create weak points and lead to material deformation.

In summary:
- Permanent load: max. 13–15 kg
- Short-term load: up to max. 20 kg

For higher weights, a more robust shelving system should be considered.

SUBEN60 schrieb:
It is also important that the load is evenly distributed and that no point loads occur.

This is the crucial point: With Kallax, the lateral fixing is not very strong, which is why experts recommend placing heavy loads as close to the frame as possible.

Additionally, for frequently used compartments with heavy loads, it makes sense to use additional internal shelves or screwed-in inserts. This helps distribute the weight more evenly and reduces the stress on individual panels.

The shelf unit itself should always stand on a solid surface and, if carrying heavier loads, be secured to the wall as needed.